:root {
  --bg: #0a0a0c;
  --bg-soft: #111114;
  --ink: #ece9e2;
  --ink-dim: #8a8780;
  --accent: #c8ff3d;
  --line: rgba(236, 233, 226, 0.1);
  /* 浅色画廊区 */
  --paper: #f3f1ea;
  --paper-soft: #e8e5db;
  --paper-ink: #17171a;
  --paper-dim: #6c685f;
  --accent-ink: #4f7300;
  --line-dark: rgba(20, 20, 24, 0.12);
  /* 浮起暖灰卡片 */
  --card: #cfccc2;
  --card-soft: #c2bfb4;
  --card-ink: #1c1c1f;
  --card-dim: #5d5a52;
  --card-line: rgba(20, 20, 24, 0.14);
  --serif: 'Cormorant Garamond', serif;
  --sans: 'Space Grotesk', system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 参数化背景画布 */
#field {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* 颗粒质感 */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 8s steps(8) infinite;
}
@keyframes grain {
  0%,100% { transform: translate(0,0); }
  25% { transform: translate(-3%,2%); }
  50% { transform: translate(2%,-3%); }
  75% { transform: translate(-2%,-2%); }
}

/* 通用容器层级 */
.nav, section { position: relative; z-index: 2; }

section {
  padding: 12vh clamp(24px, 8vw, 160px);
  max-width: 1600px;
  margin: 0 auto;
}

/* 导航 */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px clamp(24px, 8vw, 160px);
  z-index: 50;
  mix-blend-mode: difference;
}
.logo {
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 0.95rem;
  color: #fff;
  text-decoration: none;
}
.nav-links { display: flex; gap: 30px; list-style: none; }
.nav-links a {
  color: #fff;
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  opacity: 0.75;
  transition: opacity 0.3s;
}
.nav-links a:hover { opacity: 1; }

/* 语言切换 */
.lang-toggle {
  background: none;
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  padding: 6px 12px;
  border-radius: 20px;
  cursor: pointer;
  transition: border-color 0.3s;
}
.lang-toggle:hover { border-color: #fff; }
.lang-toggle span { opacity: 0.45; transition: opacity 0.3s; }
.lang-toggle span.on { opacity: 1; }

/* 信任状 */
.hero-creds {
  margin-top: 22px;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
}

/* 滚动揭示动画 */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s cubic-bezier(.2,.7,.2,1), transform 0.9s cubic-bezier(.2,.7,.2,1);
}
.reveal.in { opacity: 1; transform: none; }

/* ===== 首页 ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 18vh;
}
.hero-index {
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  margin-bottom: 28px;
}
.hero-title {
  font-weight: 300;
  line-height: 0.95;
  font-size: clamp(3rem, 11vw, 11rem);
  letter-spacing: -0.02em;
}
.hero-title .line { display: block; }
.hero-title .ital {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
  padding-left: 0.15em;
}
.hero-sub {
  margin-top: 36px;
  font-size: clamp(0.9rem, 1.6vw, 1.15rem);
  color: var(--ink-dim);
  letter-spacing: 0.04em;
}
.scroll-hint {
  margin-top: 9vh;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
  display: flex;
  align-items: center;
  gap: 14px;
}
.scroll-hint span {
  width: 46px; height: 1px;
  background: var(--ink-dim);
  position: relative; overflow: hidden;
}
.scroll-hint span::after {
  content: ''; position: absolute; inset: 0;
  background: var(--accent);
  animation: slide 2.4s cubic-bezier(.7,0,.3,1) infinite;
}
@keyframes slide {
  0% { transform: translateX(-100%); }
  60%,100% { transform: translateX(100%); }
}

/* ===== 区块头 ===== */
.sec-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 64px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}
.sec-num { font-size: 0.8rem; color: var(--accent); letter-spacing: 0.2em; }
.sec-label {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* ===== 关于 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: start;
}
.about-lead {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.8rem, 4vw, 3.4rem);
  line-height: 1.2;
  color: var(--ink);
}
.about-body p { color: var(--ink-dim); margin-bottom: 20px; max-width: 46ch; }
.about-stats {
  grid-column: 1 / -1;
  display: flex;
  gap: clamp(30px, 6vw, 90px);
  margin-top: 40px;
  border-top: 1px solid var(--line);
  padding-top: 40px;
}
.stat { display: flex; flex-direction: column; }
.stat .num {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.stat .cap { font-size: 0.82rem; color: var(--ink-dim); letter-spacing: 0.05em; }

/* ===== AI 实践(四宫格扁平矩形) ===== */
.practice { padding-top: 8vh; padding-bottom: 8vh; }
.practice-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.practice-cell {
  background: var(--bg);
  padding: 26px 22px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  min-height: 96px;
  transition: background 0.4s;
}
.practice-cell:hover { background: var(--bg-soft); }
.p-no {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  line-height: 1;
}
.p-name { font-size: 1.02rem; font-weight: 500; line-height: 1.3; }
.p-sub { font-size: 0.78rem; color: var(--ink-dim); margin-top: 6px; }
.practice-cell.has-gallery {
  position: relative;
  cursor: pointer;
}
.practice-cell.has-gallery::after {
  content: '↓';
  margin-left: auto;
  align-self: center;
  color: var(--accent);
  font-size: 1.35rem;
  line-height: 1;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.3s, transform 0.3s;
}
.practice-cell.has-gallery:hover::after,
.practice-cell.has-gallery.active::after {
  opacity: 1;
  transform: translateY(0);
}
.practice-cell.has-gallery.active { background: var(--bg-soft); }
.practice-panel {
  display: none;
  border: 1px solid var(--line);
  border-top: none;
  background: var(--bg-soft);
  padding: clamp(18px, 3vw, 42px);
}
.practice-panel.open {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
  gap: clamp(22px, 4vw, 60px);
  align-items: center;
}
.practice-view {
  position: relative;
  background: #050506;
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 24px 60px -30px rgba(0,0,0,0.8);
}
.practice-view img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #050506;
  animation: practiceFade 1.4s cubic-bezier(.2,.7,.2,1);
}
@keyframes practiceFade {
  from { opacity: 0; transform: scale(1.015); filter: blur(6px); }
  to { opacity: 1; transform: scale(1); filter: blur(0); }
}
.practice-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255,255,255,0.24);
  border-radius: 50%;
  background: rgba(10,10,12,0.54);
  color: var(--ink);
  font-size: 1.6rem;
  cursor: pointer;
  z-index: 2;
  transition: border-color 0.3s, color 0.3s, background 0.3s;
}
.practice-nav:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(10,10,12,0.78);
}
.practice-nav.prev { left: 16px; }
.practice-nav.next { right: 16px; }
.practice-copy { color: var(--ink-dim); }
.practice-count {
  color: var(--accent);
  font-family: var(--serif);
  font-style: italic;
  font-size: 2rem;
  margin-bottom: 20px;
}
.practice-copy p {
  max-width: 42ch;
  font-size: 0.96rem;
}
.practice-video-link {
  display: inline-flex;
  align-items: center;
  margin-top: 22px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 6px;
  opacity: 0.82;
  transition: opacity 0.3s, transform 0.3s;
}
.practice-video-link:hover {
  opacity: 1;
  transform: translateX(6px);
}
.practice-dots {
  display: flex;
  gap: 10px;
  margin-top: 28px;
}
.practice-dots button {
  width: 34px;
  height: 2px;
  border: none;
  background: var(--line);
  cursor: pointer;
  transition: background 0.3s, width 0.3s;
}
.practice-dots button.on {
  width: 54px;
  background: var(--accent);
}

/* ===== 其他技能 ===== */
.extra-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.extra-cell {
  background: var(--bg);
  padding: 34px 28px;
  transition: background 0.4s;
}
.extra-cell:hover { background: var(--bg-soft); }
.x-no { font-family: var(--serif); font-style: italic; font-size: 1.4rem; color: var(--accent); }
.x-name { font-size: 1.15rem; font-weight: 500; margin: 14px 0 6px; }
.x-sub { font-size: 0.82rem; color: var(--ink-dim); }

/* 更多作品小标题 */
.work-grid-head {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin: clamp(40px, 6vw, 80px) 0 30px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-dark);
}

/* ===== 能力双线 ===== */
.cap-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.cap-col { background: var(--bg); padding: clamp(28px, 4vw, 52px); }
.cap-title {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  color: var(--accent);
}
.cap-desc { color: var(--ink-dim); margin: 10px 0 28px; font-size: 0.95rem; }
.cap-list { list-style: none; }
.cap-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.cap-list b { font-weight: 500; font-size: 1.02rem; }
.cap-list i { font-style: normal; font-size: 0.8rem; color: var(--ink-dim); text-align: right; }

/* ===== 深度案例 ===== */
.work-feature { display: flex; flex-direction: column; gap: clamp(40px, 7vw, 110px); margin-bottom: clamp(60px, 9vw, 130px); }
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(30px, 5vw, 80px);
  align-items: center;
}
.feature:nth-child(even) .feat-visual { order: 2; }
.feat-visual {
  position: relative;
  aspect-ratio: 5 / 4;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  overflow: hidden;
}
.feat-visual::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(110% 110% at 70% 25%, rgba(200,255,61,0.12), transparent 55%);
}
.feat-canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.65; }
.feat-img {
  position: absolute;
  inset: 8%;
  width: 84%;
  height: 84%;
  object-fit: contain;
  z-index: 1;
  filter: drop-shadow(0 24px 34px rgba(0,0,0,0.28));
  transition: transform 0.7s cubic-bezier(.2,.7,.2,1), filter 0.7s;
}
.feature-link { cursor: pointer; }
.feature-link:hover .feat-img {
  transform: translateY(-8px) scale(1.04) rotate(-1deg);
  filter: drop-shadow(0 34px 44px rgba(0,0,0,0.34));
}
.feature-link:hover .feat-title { color: var(--accent); }
.feature-link .feat-text::after {
  content: 'VIEW CASE';
  display: inline-block;
  margin-top: 24px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 5px;
  opacity: 0.78;
}
.feat-no {
  position: absolute; left: 24px; bottom: 18px;
  font-family: var(--serif); font-style: italic;
  font-size: 3.4rem; color: rgba(236,233,226,0.16); z-index: 2;
}
.feat-tag { font-size: 0.74rem; letter-spacing: 0.2em; color: var(--accent); text-transform: uppercase; }
.feat-title { font-size: clamp(1.5rem, 2.8vw, 2.4rem); font-weight: 400; margin: 14px 0 18px; line-height: 1.2; }
.feat-desc { color: var(--ink-dim); max-width: 50ch; }
.feat-steps { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.feat-steps span {
  font-size: 0.74rem; letter-spacing: 0.06em;
  padding: 6px 14px; border: 1px solid var(--line); border-radius: 20px;
  color: var(--ink-dim);
}
.feat-steps span:last-child { border-color: var(--accent); color: var(--accent); }

/* ===== 荣誉 ===== */
.honor-list { display: flex; flex-direction: column; }
.honor {
  display: flex; align-items: baseline; gap: clamp(20px, 5vw, 70px);
  padding: clamp(20px, 3vw, 34px) 0;
  border-top: 1px solid var(--line);
  transition: padding-left 0.4s, color 0.4s;
}
.honor:last-child { border-bottom: 1px solid var(--line); }
.honor:hover { padding-left: 14px; }
.h-year { font-size: 0.9rem; color: var(--accent); letter-spacing: 0.1em; min-width: 70px; }
.h-name { font-size: clamp(1.1rem, 2.4vw, 1.9rem); font-weight: 300; }

/* ===== 作品 ===== */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(20px, 3vw, 48px);
}
.work-card {
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 30px;
  transition: border-color 0.5s, transform 0.5s;
}
.work-card:hover { border-color: var(--accent); transform: translateY(-6px); }
.work-card .w-visual {
  position: absolute; inset: 0;
  background: radial-gradient(120% 120% at 70% 20%, rgba(200,255,61,0.14), transparent 55%);
  opacity: 0.7; transition: opacity 0.5s, transform 0.8s;
}
.work-card:hover .w-visual { opacity: 1; transform: scale(1.06); }
.work-card canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.55; }
.w-meta { position: relative; z-index: 2; }
.w-tag { font-size: 0.72rem; letter-spacing: 0.2em; color: var(--accent); text-transform: uppercase; }
.w-title { font-size: clamp(1.3rem, 2.4vw, 2rem); font-weight: 400; margin-top: 8px; }
.w-desc { font-size: 0.85rem; color: var(--ink-dim); margin-top: 6px; max-width: 38ch; }

/* ===== 技能 ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.skill {
  background: var(--bg);
  padding: 36px 30px;
  transition: background 0.4s;
}
.skill:hover { background: var(--bg-soft); }
.skill-name {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 1.05rem;
  margin-bottom: 18px;
}
.skill-name b { font-weight: 500; }
.skill-name i { font-style: normal; font-size: 0.78rem; color: var(--accent); letter-spacing: 0.1em; }
.skill-bar { height: 2px; background: var(--line); position: relative; overflow: hidden; }
.skill-bar::after {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: var(--lvl, 80%);
  background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform 1.1s cubic-bezier(.2,.7,.2,1);
}
.skill.in .skill-bar::after { transform: scaleX(1); }

/* ===== 联系 ===== */
.contact { min-height: 90vh; display: flex; flex-direction: column; justify-content: center; }
.contact-title {
  font-size: clamp(2.6rem, 9vw, 8rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.02em;
}
.contact-title .ital { font-family: var(--serif); font-style: italic; color: var(--accent); }
.contact-sub { color: var(--ink-dim); margin-top: 24px; font-size: 1.1rem; }
.contact-links { margin-top: 48px; }
.c-link {
  font-size: clamp(1.4rem, 3.5vw, 2.6rem);
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
  transition: color 0.3s, border-color 0.3s;
}
.c-link:hover { color: var(--accent); border-color: var(--accent); }
.c-social { display: flex; gap: 28px; margin-top: 40px; }
.c-social a {
  color: var(--ink-dim); text-decoration: none; font-size: 0.85rem;
  letter-spacing: 0.1em; transition: color 0.3s;
}
.c-social a:hover { color: var(--ink); }
.footer {
  margin-top: 14vh;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
}

/* ===== Plan B:作品浅色画廊区 ===== */
/* ===== 作品区:深色背景 + 浮起暖灰卡片 ===== */
.work .sec-num { color: var(--accent); }
.work .sec-label { color: var(--ink-dim); }

/* 深度案例:暖灰卡片浮起 */
.work .feat-visual {
  border: none;
  background: var(--card);
  border-radius: 6px;
  box-shadow: 0 24px 60px -24px rgba(0,0,0,0.7), 0 2px 8px rgba(0,0,0,0.3);
}
.work .feat-visual::after { background: radial-gradient(110% 110% at 70% 25%, rgba(28,28,31,0.06), transparent 55%); }
.work .feat-no { color: rgba(28,28,31,0.16); }
.work .feat-tag { color: var(--accent); }
.work .feat-title { color: var(--ink); }
.work .feat-desc { color: var(--ink-dim); }
.work .feat-steps span { border-color: var(--line); color: var(--ink-dim); }
.work .feat-steps span:last-child { border-color: var(--accent); color: var(--accent); }

/* 作品卡片:暖灰卡片浮起 */
.work .work-card {
  border: none;
  background: var(--card);
  border-radius: 6px;
  box-shadow: 0 18px 44px -22px rgba(0,0,0,0.7), 0 2px 6px rgba(0,0,0,0.3);
  color: var(--card-ink);
}
.work .work-card:hover { box-shadow: 0 30px 64px -20px rgba(0,0,0,0.8), 0 0 0 1px var(--accent); }
.work .work-card .w-visual { background: radial-gradient(120% 120% at 70% 20%, rgba(28,28,31,0.06), transparent 55%); }
.work .w-tag { color: var(--accent-ink); }
.work .w-title { color: var(--card-ink); }
.work .w-desc { color: var(--card-dim); }
.work .work-grid-head { color: var(--ink-dim); border-bottom-color: var(--line); }

/* ===== 响应式 ===== */
@media (max-width: 820px) {
  .nav-links { gap: 14px; }
  .nav-links li:nth-child(n+3) { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .about-stats { flex-wrap: wrap; gap: 30px; }
  .work-grid, .skills-grid { grid-template-columns: 1fr; }
  .cap-cols { grid-template-columns: 1fr; }
  .feature { grid-template-columns: 1fr; gap: 26px; }
  .feature:nth-child(even) .feat-visual { order: 0; }
  .hero-creds { font-size: 0.78rem; }
  .honor { gap: 18px; }
  .practice-grid { grid-template-columns: repeat(2, 1fr); }
  .practice-panel.open { grid-template-columns: 1fr; }
  .extra-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .practice-grid { grid-template-columns: 1fr; }
}